Hi Bright Sun wrote: > Hi, > > Tks, this is not what I wanted. > > I want remove pairs list, > > [(5,1),(4,1),(3,1),(2,1),(1,1)] remove [(2,1),(1,1)] > [(5,1),(4,1),(3,1)]
[(5,1),(4,1),(3,1),(2,1),(1,1)] \\ [(2,1),(1,1)] should give the right result. Befere using the '\\' operator you may need to load the List module (in Hugs :load List). Hope it helps, Mads Lindstr�m > > so pairs [(2,1),(1,1)] removed. > > Tks. > > --- Pierre Barbier de Reuille > <[EMAIL PROTECTED]> wrote: > > One answer is the infix operator (\\) defined in the > > List module (or in > > Data.List ...) > > > > But it's in ont of the "set" operations. For example > > try : > > > > [1..10] \\ [3..6] > > [1,2,7,8,9,10] > > > > But also : > > > > ([1..10]++[1..10]) \\ [3..6] > > [1,2,7,8,9,10,1,2,7,8,9,10] > > > > So _all_ the elements with values in [3..6] where > > removed !! > > If that's what you want ! Perfect ... if not : what > > do you want exactly > > ? List substraction is not uniq. > > > > Pierre > > > > Bright Sun a crit : > > > In Haskell, ++ can spends second list argument > > onto > > > the end of first list argument. How to substract > > the > > > second list from the first list? > > > > > > For example, > > > [(5,1),(4,1),(3,1),(2,1),(1,1)] > > > substract > > > [(2,1),(1,1)] > > > I want to get result list: > > > [(5,1),(4,1),(3,1)] > > > > > > Tks. > > > > > > > > > > > > __________________________________ > > > Do you Yahoo!? > > > Make Yahoo! your home page > > > http://www.yahoo.com/r/hs > > > _______________________________________________ > > > Haskell mailing list > > > [email protected] > > > http://www.haskell.org/mailman/listinfo/haskell > > > > > > > -- > > Pierre Barbier de Reuille > > > > INRA - UMR Cirad/Inra/Cnrs/Univ.MontpellierII AMAP > > Botanique et Bio-informatique de l'Architecture des > > Plantes > > TA40/PSII, Boulevard de la Lironde > > 34398 MONTPELLIER CEDEX 5, France > > > > tel : (33) 4 67 61 65 77 fax : (33) 4 67 61 > > 56 68 > > > > > > __________________________________ > Do you Yahoo!? > Yahoo! Small Business - Try our new resources site! > http://smallbusiness.yahoo.com/resources/ > _______________________________________________ > Haskell mailing list > [email protected] > http://www.haskell.org/mailman/listinfo/haskell > _______________________________________________ Haskell mailing list [email protected] http://www.haskell.org/mailman/listinfo/haskell
